#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/types.h>
#include <linux/netlink.h>
#include <errno.h>
 
static int init_hotplug_sock(void)
{
 
    struct sockaddr_nl snl;
    const int buffersize = 16 * 1024 * 1024;
    int retval;
 
    memset(&snl, 0x00, sizeof(struct sockaddr_nl));
    snl.nl_family = AF_NETLINK;
    snl.nl_pid = getpid();
    snl.nl_groups = 1;
 
    int hotplug_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
    if (hotplug_sock == -1) 
    {
        printf("error getting socket: %s", strerror(errno));
        return -1;
    }
 
    /* set receive buffersize */
 
    setsockopt(hotplug_sock, SOL_SOCKET, SO_RCVBUFFORCE, &buffersize, sizeof(buffersize));
    retval = bind(hotplug_sock, (struct sockaddr *) &snl, sizeof(struct sockaddr_nl));
    if (retval < 0) {
        printf("bind failed: %s", strerror(errno));
        close(hotplug_sock);
        hotplug_sock = -1;
        return -1;
    }
 
    return hotplug_sock;
 
}
 
#define UEVENT_BUFFER_SIZE      2048

int main(int argc, char* argv[])
{
    int ret = 0;
    int opr_typ = 0;   // 0-表示添加 1-表示删除
    int hotplug_sock = init_hotplug_sock();
    char buf[UEVENT_BUFFER_SIZE*2] = {0};
    while(1)
    {
        memset(buf, 0, UEVENT_BUFFER_SIZE * 2);
        recv(hotplug_sock, &buf, sizeof(buf), 0);
        ret = strstr(buf, "add");
        if(ret < 0)
        {
            ret = strstr(buf, "remove");
            if(ret < 0)
                continue;
            else
                opr_typ = 0;
        }
        else
            opr_typ = 1;
        ret = strstr(buf, "input");
        if(ret < 0)
            continue;
        
        ret = strstr(buf, "event");
        if(ret < 0)
            continue;
        
        printf("SnoTest---------------%s\n", buf);
    }
    return 0;
}
